View Full Version : [ubuntu] Does Ubuntu need a swap file?

July 8th, 2008, 09:32 PM
I don't have any problems, but does Ubuntu need a swap file to perform better?

deanjw@ubuntu:~$ free -m
total used free shared buffers cached
Mem: 3955 709 3245 0 14 323
-/+ buffers/cache: 371 3583
Swap: 0 0 0

July 8th, 2008, 09:36 PM
With 4G of RAM, you will probably never use a swap partition but, you can add one if you like (having one or not having one won't effect performance in your case). The only real benefit would be if you had an application that started to eat all available memory. With a swap partition you'd probably notice this before it started to do something harmful to the system because you'd noticing your drives going crazy and the system starting to become unresponsive as memory started swapping out. You also need swap if you plan to use the hibernate ability found on most laptops.

July 9th, 2008, 04:21 AM
Even if you have lots of RAM, the swapfile still has a couple of uses.

1. If you happen to be running a very intensive application, like a large spreadsheet and you do a big re-calculate, the swapfile may come into play. The same if you have several processor-intensive applications all running at once it may also kick-in.

2. If you have a laptop, the swapfile is used for suspend and hibernate.

Roger :cool: